/**
 * OSAmI: Open Source Ambient Intelligence
 * Copyright (C) 2010 Bull S.A.S.
 * Contact: osami-general@osami-commons.org
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA
 */

package org.osami.gateway.tests.internal;

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;

import org.apache.felix.ipojo.annotations.Component;
import org.apache.felix.ipojo.annotations.Instantiate;
import org.apache.felix.ipojo.annotations.Invalidate;
import org.apache.felix.ipojo.annotations.Property;
import org.apache.felix.ipojo.annotations.Requires;
import org.apache.felix.ipojo.annotations.Validate;
import org.osami.gateway.storage.IAlarmStorage;

@Component
@Instantiate
public class DefaultAlarmProvider {
	
	@Requires
	private IAlarmStorage storage;
	
	/**
	 * Period in second.
	 */
	@Property(value = "15")
	private int period;
	
	private RandomAlarmGenerator generator;
	
	private ScheduledExecutorService executor;
	
	private ScheduledFuture<?> future;

	@Validate
	private void start() {
		generator = new RandomAlarmGenerator();
		executor = Executors.newScheduledThreadPool(1);
		
		future = executor.scheduleAtFixedRate(new Runnable() {
			
			public void run() {
				generateOneAlarm();
			}
		}, 1, period, TimeUnit.SECONDS);
	}
	
	@Invalidate
	private void stop() {
		if (future != null) {
			future.cancel(true);
			future = null;
		}
	}
	
	private void generateOneAlarm() {
		MockAlarm alarm = generator.generate();
		storage.store(alarm);
	}

}
